And 10 Years Warranty are less important than you think. Because nobody knows if the Manufacturer will leave the Market, go bancrupt or there is just a new SPecification that makes the PSU useless (personally I'd bet on the Specifications)...

And there are other things in the Warranty terms that give the Manufacturer every right to just say no.

I really don't get why people are so obsessed with the Warranty length and don't even look at the Terms or think about them...

Because that's more important. If you have 5 or 10 Years? Who cares. Especially since the ATX Specification survived double the time its predecessor did. And its some shit from the 80s that was designed to power the CPU I/O stuff directly from the PSU - wich obviously nobody did. And was made, like its predecessor, to be rather 5V heavy - wich nobody really uses today...